Abstract
SnS is a promising nontoxic and earth-abundant material suitable for photovoltaic applications. Photovoltaic solar cells based on tin sulphide absorbers have been analysed by using Solar Cell Capaci- tance Simulator software. The photovoltaic cell consists of SnS absorber layer, CdS as buffer and ZnO as optical window following the sequence p-SnS/CdS/ZnO. After optimization of different parameters and layer thicknesses a maximum efficiency of 10.6%, VOC of 0.92 V, JSC of 13.4 mA/cm2 and Fill Factor of 86.3% were reached. Simulation studies by varying several solar cell parame- ters such as thickness of various layers reveal that increasing the thickness of absorber layer results in higher efficiency. The concen- tration of shallow acceptors in the SnS has a crucial effect in the conversion efficiency, which rises up to about 15% for acceptor concentrations of 1019 cm􏰂3. The effect of the compensation ratio between donors and acceptors was also analysed but its effect on conversion efficiency is insignificant.
